85867842011537 has 4 divisors (see below), whose sum is σ = 85887550035636. Its totient is φ = 85848133987440.

The previous prime is 85867842011533. The next prime is 85867842011543. The reversal of 85867842011537 is 73511024876858.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70221735185281 + 15646106826256 = 8379841^2 + 3955516^2 .

It is a cyclic number.

It is not a de Polignac number, because 85867842011537 - 2² = 85867842011533 is a prime.

It is a super-2 number, since 2×85867842011537² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85867842011533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9854005514 + ... + 9854014227.

It is an arithmetic number, because the mean of its divisors is an integer number (21471887508909).

Almost surely, 2^{85867842011537} is an apocalyptic number.

It is an amenable number.

85867842011537 is a deficient number, since it is larger than the sum of its proper divisors (19708024099).

85867842011537 is a wasteful number, since it uses less digits than its factorization.

85867842011537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19708024098.

The product of its (nonzero) digits is 90316800, while the sum is 65.

The spelling of 85867842011537 in words is "eighty-five trillion, eight hundred sixty-seven billion, eight hundred forty-two million, eleven thousand, five hundred thirty-seven".